sleep: use pause

[tsalkenov]

Similar to how gnu coreutils works with inf

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #9287 will degrade performances by 2.56%

_{Comparing tsalkenov:master (7122600) with main (7f4d902)}

Summary

❌ 1 regression
✅ 122 untouched
⏩ 5 skipped[^skipped]

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	tsort_input_parsing_heavy[5000]	81.5 ms	83.7 ms	-2.56%
[^skipped]: 5 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

[github-actions[bot]]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)

[sylvestre]

could you please add a test to make sure we don't regress? thanks

[github-actions[bot]]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)